Re: [PATCH 4/4] DMA: XILINX_ZYNQMP_DPDMA depends on HAS_IOMEM

[Laurent Pinchart]

Hi Randy,

Thank you for the patch.

On Fri, May 21, 2021 at 07:13:13PM -0700, Randy Dunlap wrote:
> When CONFIG_HAS_IOMEM is not set/enabled, most iomap() family
> functions [including ioremap(), devm_ioremap(), etc.] are not
> available.
> Drivers that use these functions should depend on HAS_IOMEM so that
> they do not cause build errors.
> 
> Cures this build error:
> s390-linux-ld: drivers/dma/xilinx/xilinx_dpdma.o: in function `xilinx_dpdma_probe':
> xilinx_dpdma.c:(.text+0x336a): undefined reference to `devm_platform_ioremap_resource'

I've previously posted
https://lore.kernel.org/dmaengine/20210520152420.23986-2-laurent.pinchart@xxxxxxxxxxxxxxxx/T/#u
which fixes the same issue (plus an additional one).

> Fixes: 7cbb0c63de3fc ("dmaengine: xilinx: dpdma: Add the Xilinx DisplayPort DMA engine driver")
> Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
> Cc: Vinod Koul <vkoul@xxxxxxxxxx>
> CC: dmaengine@xxxxxxxxxxxxxxx
> Cc: Hyun Kwon <hyun.kwon@xxxxxxxxxx>
> Cc: Tejas Upadhyay <tejasu@xxxxxxxxxx>
> Cc: Michal Simek <michal.simek@xxxxxxxxxx>
> Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> ---
>  drivers/dma/Kconfig |    1 +
>  1 file changed, 1 insertion(+)
> 
> --- linux-next-20210521.orig/drivers/dma/Kconfig
> +++ linux-next-20210521/drivers/dma/Kconfig
> @@ -702,6 +702,7 @@ config XILINX_ZYNQMP_DMA
>  
>  config XILINX_ZYNQMP_DPDMA
>  	tristate "Xilinx DPDMA Engine"
> +	depends on HAS_IOMEM
>  	select DMA_ENGINE
>  	select DMA_VIRTUAL_CHANNELS
>  	help

-- 
Regards,

Laurent Pinchart